Ring-mold.



EETTED sTATEs PATENT oEEioE. A

ADOLPI-I HER/MAN, OF ST. LOUIS, MISSOURI.

RING-MOLD.

To all whom "it may concern:

Be it known that I, ADoLPH HERMAN, a citizen of the United States,residing at St. Louis, State of Missouri, have'invented certain new anduseful Improvements in Rin-g- Molds, of which the -following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming a part hereof.

My invention has relation to improvements in ring-molds; and it consistsin the novel construction of mold more fully set forth in thespecification andr pointed out in the claim.

In the drawings, Figure 1' is a perspective of one section of the mold,Fig. 2 is a perspective of the complementary section; Fig. 3 is aperspective of the disk-coreg Fig. 4 is a perspective of the crown-core;Fig. 5 is an end view of Fig. t; Fig. 6 is a perspective of the moldsections assembled and clamped together; Fig. 7 is a longitudinalsection on the line 7 7 of Fig. 6; Fig. 8 is a cross-section on the line8-8 of Fig. 7; Fig. 9 is a bottom plan of the assembled mold with clampremoved; Fig. lO is a plan of the ring; and Fig. 11 is an edge viewthereof.

The object of my invention is to construct a mold for the casting offinger rings which will insure a smooth finish for the ring casttherein; one which will make rample provision for the escape of gasesincident to the molding operation; one which will insure a uniformdisposition for the crown or chaton relatively to the shank of the ring;one provided with specific means for i clamping together the sections ofthe mold;

one which will have a long life;` and one possessing further and otheradvantages better apparent from a detailed description of the invention,which is as follows Referring to the drawings, a, a, represent the mainhalves or sections of the moldbody, one of the sections being providedwith sockets or holes Z; to receive the dowels or pins d of the oppositesection. Disposed along the meeting faces of the sections aresemi-cylindrical transverse depressions 1, l, forming a cylindricalopening or passage way O through the body of the mold as shown. Formedalong the faces of the depressions l, l, and disposed in a plane atright angles to the aXis of the opening O are inwardly openingsemi-circular grooves Specication of Letters Patent.

Application filed February 3, 1911.

Patented June 6, 1911. serial No. 606,413.

assembled, an annular passage-way or moldgroove which communicates atthe top with an intake outwardly flaring or funnellshaped passage orpouring spout 3, one` opposite the intersection of said annularpassage-way with the vspout 3, is a smaller outwardly flaring passage 4,one-half of said passage being identified with each sec` tion of themold. The passage 4 is closed by a bottom plate or removable mounting 5which is held to the respective sections a, ai, of the mold, by ascrew-clamp C of any approved type, said clamp serving likewise to holdthe sections a, a, to one another. As shown to best advantage inFig. 6,the clamp is a mere U-shaped member engaging the several sections a., 5,a., of the mold, a screw m serving to draw the parts together. Obviouslyany equivalent clamp or device will answer to hold the mold sectionsto-' The cross-section of the shank 6 is diamondshaped, the longitudinalor longer axis of the diamond being disposed on the longitudinal aXis ofthe plate or mounting 5, and in the plane of the shank fr of the ringwhen the latter is cast. In other words, the longer aXis of the diamonddefining the cross-section of the stem 6, lies in the plane ofdisposition of the annular passage 2; and thisfor a purpose presently toappear. Formed in the plate 5 around the opening receiving the shank 6are a series of ducts e filled with` crushed charcoal and serving asvents for the gases which are generated in the casting of the ring. Thesurfaces of the depressions l, l, which form the central hole O arestreaked with parallel marks or lines n to a sufficient depth to leavevents for the escape of the gases, the inner ends of these or ducts 2,2, forming, when the sections are vents terminating behind the disk-coreor plug 9 inserted into the opening O, said disk being of sulficientwidth or thickness to overlap the sides of the passage-way 2 (Fig. 8).Obviously, the purpose of the core 9 is to permit the formation of thering-shank 1 by closing up the mold-groove 2 which would otherwiseremain open to the passage O.

By making the cross-section of the shank or stem 6 of the crown-core 7diamondshaped, with the long axis of the diamond in the plane ofdisposition of the annular passage Q, it is obvious that said shank canbe inserted only one way through the plate 5, so that when the plate 5is in position (Figs. 6, 7) the ribs composing the core will always bedisposed in a iXed relation to the -passage 2. This fixed relationcontemplates the alining of two of the crown-core ribs with the plane ofthe passage 2 (or general plane of the ring r) so that when the metal iscast, the said ribs will leave a space w (Fig. 1l) between two oppositeprongs of the crown 71 said space being in the plane of the ring. It isof course, not desirable to cast a crown prong in the plane of the ringas all the prongs should be disposed symmetrically on opposite sides ofthe plane of the shank r. It follows therefore that the plate 5 and stem6 of the core 7 serve to guide the core to its proper position withinthe mold, so that the prongs of the crown or setting will be uniformlydisposed about the shank 11 as indicated. The parts a, a, 5, arecomposed of hard gas-retort carbon (motor-brush carbon), which iscompact and practically indestructible, the central disk-core 9 and thefilling of the vents e being composed of crushed or powdered charcoal orcarbon which may be renewed from time to time, the porosity of crushedor powdered charcoal, even where pressed into a disk such as 9,affording the necessary freedom for the escape of the gases during thecasting operation. The mold is shown 'ready for the casting operation inFig. 6, being in practice set into a bed of hot sand contained in anopen dish or vessel (not shown). rlhe molten metal is poured into thespout or passage 3, flowing thence around the core 9 through the annularchannel 2, and into the spaces between the ribs of the core-crown 7, thegases escaping through the vents as already described. At the conclusionof the operation, the clamp C is removed, then the plate 5 is slippedolf the shank 6, the latter being given a slight tap with a hammer orother tool to loosen the core 7 from the cast ring. The sections a, a,are then separated or parted and the ring drops out. The metal solidiedin the passage 3 and adhering to the shank 7" is cut o for use insubsequent operations as well understood in the art.

Having described my invention, what I claim is In a ring-mold providedwith a moldgroove for the ring-shank, a crown-core insertible throughthe mold into cooperative position with the mold-groove, a shank on thecrown-core substantially diamondshapcd in cross-section, a plateformingthe bot-tom of the mold and provided with an opening to receivethe shank aforesaid, the main axis of the diamond cross section being inthe plane of the axis of the plate and in the plane of the mold-groovewhereby the crown-core is properly positioned to insure the properdisposition of the crown prongs on the ring-shank.

In testimony whereof I atlix my signature, in presence of two witnesses.

ADOLPI-I HERMAN.

fitnesses EMIL STAREK, J os. A. MICHEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

